DocumentCode :
2862518
Title :
A novel control method for multilevel converter used inenvelope tracking power supply
Author :
Qing, Liu ; Donglai, Zhang ; Mingyu, Liu
Author_Institution :
Shenzhen Graduate School, Harbin Institute of Technology, HIT, China
Volume :
4
fYear :
2012
fDate :
2-5 June 2012
Firstpage :
3010
Lastpage :
3014
Abstract :
The topology of a multilevel converter in series with a linear regulator is a hybrid solution for envelope tracking power supply. A novel control method based on Walsh Transformation of envelope reference was proposed for the multilevel converter. The needed voltage levels for multilevel converter can be derived from the linear combinations of Walsh coefficients and the number of voltage levels can be determined by the order of Walsh basis. The overall power losses of the hybrid topology was analyzed and an algorithm for the optimization of the voltage levels was explained. The proposed control method is simple and can effectively reduce the ratio between the switching frequency and the bandwidth of envelope reference, especially for the periodic signal. A prototype was built for the hybrid solution, which can reproduce any signal with maximum spectral component of 1MHz and give instantaneous maximum power of 50W.
Keywords :
Bandwidth; Power supplies; Radio frequency; Regulators; Switches; Topology; Voltage control; Walsh Transformation; envelope elimination and restoration (EER); envelope tracking(ET); linear regulator; multilevel converter;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics and Motion Control Conference (IPEMC), 2012 7th International
Conference_Location :
Harbin, China
Print_ISBN :
978-1-4577-2085-7
Type :
conf
DOI :
10.1109/IPEMC.2012.6259351
Filename :
6259351
Link To Document :
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